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Contrast Checker
Check color contrast ratios and WCAG accessibility compliance.
All data is processed in your browser. Nothing is uploaded to any server.
Large sample textSmall text to test readability on this background. Sphinx of black quartz, judge my vow.— live preview
Contrast ratio13.34:1
GoodAA · small textMin 4.5:1Pass
AA · large textMin 3.0:1Pass
AAA · small textMin 7.0:1Pass
AAA · large textMin 4.5:1Pass
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Contrast Checker — WCAG Accessibility
Check WCAG contrast ratios for accessibility. Ensure your design meets AA and AAA standards.
- ✓100% free, no sign-up required
- ✓Runs entirely in your browser — no file upload to server
- ✓Fast processing with instant results
- ✓Works on desktop and mobile
- ✓Privacy-first: your data never leaves your device
Is this tool really free?
Yes, completely free with no hidden charges, watermarks, or file limits.
Where are my files processed?
All processing happens locally in your browser. Nothing is uploaded to any server.
Do I need to create an account?
No account required. Just open the tool and start using it immediately.